/Engine/Source/Runtime/Landscape/Classes/LandscapeComponent.h
static void GenerateWeightmapMips ( int32 InNumSubsections, int32 InSubsectionSizeQuads, [UTexture2D](API\Runtime\Engine\Engine\UTexture2D) * WeightmapTexture, [FColor](API\Runtime\Core\Math\FColor) * BaseMipData )